[kensmosis]

For various reasons, I want to split an existing Calibre Library in two. After creating a new library, there does not seem to be an obvious way to move books from the old one. By "move", I mean that a copy with all files, metadata, column names, tags, etc should appear in the new library and the copy (including any files) in the old library should disappear. That is, the book and all its ancillary info should cleanly and completely be transferred between the libraries. I could add the books from the old library to the new one as files -- but that would lose a lot of the column and tag data, and I'd still need to remove them from the old library. Is there a library-level operation that can do this? I imagine having two copies of calibre open and dragging from one to the other -- or something like that. Perhaps I could simply move the relevant subdirectories from one library to another and then run a regen or fix command to reacquire any central info? The number of documents being transferred is in the thousands and I'll be picking and choosing by hand -- so anything to reduce the manual work involved would be a great help. I guess I could consider this as 2 questions: (1) is there a move op as described, and (2) how would I efficiently perform it on many books (i.e. interface).
Apologies if this question has been asked; I didn't see anything analogous in the forums, but if there is some other term for the op I may have missed it. Thanks in advance for your help.